<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环 嵌套渲染二级权限 -->
                        <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 通过for循环 嵌套渲染三级权限 -->
                            <el-col :span="18">
                                <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                    {{ item3.authName }}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
                <!-- <pre>
                    {{ scope.row }}
                </pre> -->
            </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="450px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button type="warning" icon="el-icon-setting" size="mini" 
            @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addRolesForm"
        :rules="addRolesRules"
        ref="addRolesRule"
        label-width="90px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </div>
    </el-dialog>
    <!-- 对话框 编辑角色 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editRolesForm"
        :rules="editRolesRules"
        ref="editRolesRule"
        label-width="90px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" 
    :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
    <!-- 树形控件 -->
    <el-tree :data="rightslist" :props="treeProps" show-checkbox 
    node-key="id" default-expand-all :default-checked-keys="defKeys" 
    ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible:false,
      // 添加角色列表
      addRolesForm: {
        roleId: "",
        roleName: "",
        roleDesc: "",
      },
      // 修改时 查询到的角色对象
      editRolesForm: {},
      rightslist:[],
    // 树形控件的属性绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
    // 默认选中的节点id值数组
      defKeys:[],
    //   当前即将分配权限的角色id
      roleTd:'',
      // 添加角色表单校验规则
      addRolesRules: {
        roleName: [{ required: true, message: "请输入角色名称", trigger: "blur" }],
        roleDesc: [{ required: true, message: "请输入角色描述", trigger: "blur" }],
      },
      // 修改角色表单校验规则
      editRolesRules: {
        roleName: [{ required: true, message: "请输入角色名称", trigger: "blur" }],
        roleDesc: [{ required: true, message: "请输入角色描述", trigger: "blur" }],
      },
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取角色列表 所以数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolesList = res.data;
      // this.$message.success('获取角色列表成功！');
    },
    // 关闭添加角色对话框时 重置
    addDialogClosed() {
      this.$refs.addRolesRule.resetFields();
    },
    // 添加角色 点击确定按钮时 先预验证 再发送请求和重新获取列表
    addRole() {
      this.$refs.addRolesRule.validate(async (valid) => {
        if (!valid) return;
        // 可以发起网络请求
        const { data: res } = await this.$http.post("roles", this.addRolesForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败！");
        }
        this.$message.success("添加角色成功！");
        this.addDialogVisible = false;
        this.getRolesList();
      });
    },
    // 关闭修改角色对话框时 重置
    editDialogClosed() {
      this.$refs.editRolesRule.resetFields();
    },
    // 根据id 查询这一行的角色信息并编辑
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询角色失败！");
      }
      this.editRolesForm = res.data;
      this.editDialogVisible = true;
    },
    // 修改角色 点击确定按钮时 先预验证 再发送请求和重新获取列表
    editRole() {
      this.$refs.editRolesRule.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.put("roles/" + this.editRolesForm.roleId, {
          roleName: this.editRolesForm.roleName,
          roleDesc: this.editRolesForm.roleDesc,
        });
        if (res.meta.status !== 200) {
          return this.$message.error("更新角色信息失败！");
        }
        this.editDialogVisible = false;
        this.getRolesList();
        this.$message.success("更新角色信息成功！");
      });
    },
    // 点击删除按钮 出弹框询问是否删除角色
    async removeRoleById(id) {
        // 弹框询问用户是否删除
        const confirmResult = await this.$confirm("此操作将永久删除该角色, 是否继续?", "提示", {
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
        }).catch(err => err)

        // 如果用户确认删除，则返回值为字符串‘confirm’
        // 如果用取消删除，则返回值为字符串‘cancel’
        if(confirmResult !== 'confirm')
        {
            return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete('roles/' + id);
        if(res.meta.status !==200)
        {
            return this.$message.error('删除角色失败！');
        }
        this.$message.success('删除角色成功！');
        this.getRolesList();
    },
    // 根据id删除对应的权限
    async removeRightById(role,rightId){
        // 弹框提示用户是否删除
        const result1 = await this.$confirm("此操作将永久删除该权限, 是否继续?", "提示", {
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
        }).catch(err => err)
        if(result1 !== 'confirm')
        {
            return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
        if(res.meta.status !== 200){
            return this.$message.error('删除权限失败！');
        }
        this.$message.success('删除权限成功！');
        // this.getRolesList();
        role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role){
        this.roleTd = role.id;
        // 获取所有权限数据
        const {data:res} = await this.$http.get('rights/tree');
        if(res.meta.status !== 200){
            return this.$message.error('获取权限数据失败！');
        }
        // this.$message.success('获取权限数据成功！');
        // 把获取到的权限数据保存到data中
        this.rightslist = res.data;

        // 递归获取三级节点的ID
        this.getLeafKeys(role,this.defKeys);
        this.setRightDialogVisible = true;
    },
    // 通过递归 获取角色下所有三级权限的id并保存到数组defKeys中
    getLeafKeys(node,arr){
        //判断节点是否为三级权限节点
        if(!node.children){
            return arr.push(node.id)
        }
        // 递归子节点
        node.children.forEach(item => this.getLeafKeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights(){
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
        ];
        const idStr = keys.join(',');
        const {data:res} = await this.$http.post(`roles/${this.roleTd}/rights`,{rids:idStr})
        if(res.meta.status !== 200){
            return this.$message.error('分配权限数据失败！');
        }
        this.$message.success('分配权限数据成功！');
        this.getRolesList();
        this.setRightDialogVisible = false
    },
  },
};
</script>

<style scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top:1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
